Hello, WRG45. 

I appreciate your effort in performing troubleshooting steps to resolve the issue. Allow me to help you further to get your printing alignment back to normal.

Since you have the most current version of adobe, let's go to your QuickBooks Online company and follow the steps found in this article to set your alignment: Set up alignment to print checks (or checks). 

If the same thing happens, I suggest reaching out to our customer support team. They'll be able to initiate a screen-sharing session to take a closer look to isolate this issue. Just click the link on how to reach out to our support team: QuickBooks Online Support. 

Leave a comment below if you have any other questions. I'll be more than happy to help. Have a great day!